1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb23caf8bbd0b4ad1817741d7ddaf6b781c9e4de12e3b2184c6c459436fcb122. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71f644ca-c362-4b6b-a150-a2d5aa599bba.json and https://artists.proofprofile.net/proofs/artist/71f644ca-c362-4b6b-a150-a2d5aa599bba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
TVアニメ「タイムトラベル少女〜マリ・ワカと8人の科学者たち〜」エンディングテーマ (TVサイズ)
ミス・ラビット(テレビアニメ「タイムトラベル少女〜マリ・ワカと8人の科学者たち〜」エンディングテーマ)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ce4c6bb070b8852c7e65f1b9d3b669b15eb5b369943087f9ae0ec15c83d806. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPK631700802.
怪盗♡ブラックキャッツ(TVアニメ「はじめてのギャル」EDテーマ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb651e9a4570fecc0fa2e54419e19af69d9717245840784d17acebe0628e6243b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPK631705402.
もっと、ねぇもっと(TVアニメ『立花館To Lieあんぐる』主題歌)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324d1aebc3beadb12d47ff64389989e9acca02599e297cb29649ea395aeef366. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPK631803701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f82490db023386050356dc794f396c76192f7c9d9fd77f52cd22890930ff35. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPZ742500801.
TV Animation ''She Professed Herself Pupil of the Wise Man''theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb485af67ea4b177e080e3829c748502fb4fd570cf24d95fe50fb4687df56fae6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPK632200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ca089892b145181440f8a08a99194b5d19ff0f1eeed1622667d97f62331824. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPK632200302.